From 314daaedfac3fb49d0b99648bb92bcd786c7805e Mon Sep 17 00:00:00 2001
From: borzdyko <borzdyko@corp.sputnik.ru>
Date: Fri, 21 Aug 2015 18:13:13 +0300
Subject: [PATCH 1/3] Using
 https://docs.djangoproject.com/en/1.8/ref/models/querysets/#regex for search
 filter by starting field with '$'

---
 rest_framework/filters.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rest_framework/filters.py b/rest_framework/filters.py
index e05d31ae36..931263670f 100644
--- a/rest_framework/filters.py
+++ b/rest_framework/filters.py
@@ -94,6 +94,8 @@ def construct_search(self, field_name):
             return "%s__iexact" % field_name[1:]
         elif field_name.startswith('@'):
             return "%s__search" % field_name[1:]
+        if field_name.startswith('$'):
+            return "%s__iregex" % field_name[1:]
         else:
             return "%s__icontains" % field_name
 

From 21d0e5183139e421f7f2b9fd96d765e9a1563b65 Mon Sep 17 00:00:00 2001
From: borzdyko <borzdyko@corp.sputnik.ru>
Date: Fri, 21 Aug 2015 18:23:39 +0300
Subject: [PATCH 2/3] Test for regex search filter

---
 tests/test_filters.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tests/test_filters.py b/tests/test_filters.py
index 9db685c286..0610b08557 100644
--- a/tests/test_filters.py
+++ b/tests/test_filters.py
@@ -407,6 +407,23 @@ class SearchListView(generics.ListAPIView):
             ]
         )
 
+    def test_regexp_search(self):
+        class SearchListView(generics.ListAPIView):
+            queryset = SearchFilterModel.objects.all()
+            serializer_class = SearchFilterSerializer
+            filter_backends = (filters.SearchFilter,)
+            search_fields = ('$title', '$text')
+
+        view = SearchListView.as_view()
+        request = factory.get('/', {'search': 'z{2} ^b'})
+        response = view(request)
+        self.assertEqual(
+            response.data,
+            [
+                {'id': 2, 'title': 'zz', 'text': 'bcd'}
+            ]
+        )
+
     def test_search_with_nonstandard_search_param(self):
         with override_settings(REST_FRAMEWORK={'SEARCH_PARAM': 'query'}):
             reload_module(filters)

From f0782b9451be3b04dd4239d1199ea6a7278edd21 Mon Sep 17 00:00:00 2001
From: borzdyko <borzdyko@corp.sputnik.ru>
Date: Fri, 21 Aug 2015 18:26:23 +0300
Subject: [PATCH 3/3] Doc for regex search filter

---
 docs/api-guide/filtering.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/api-guide/filtering.md b/docs/api-guide/filtering.md
index e65c6bf4f3..6f4648cfd0 100644
--- a/docs/api-guide/filtering.md
+++ b/docs/api-guide/filtering.md
@@ -260,6 +260,7 @@ The search behavior may be restricted by prepending various characters to the `s
 * '^' Starts-with search.
 * '=' Exact matches.
 * '@' Full-text search.  (Currently only supported Django's MySQL backend.)
+* '$' Regex search.
 
 For example: